Contemporary astronomy is focused on astrophysics and cosmology: black holes, the evolution of the universe, etc., and "old style" mathematical astronomy describing the motion of the Sun and Moon is often left behind. It can therefore be forgotten that these "elementary" phenomena are the basis of our time measurement and that our watches' function is to display astronomical events. The subject of this article is to explain the sometimes subtle phenomena indicated by our watches and the horological applications examined are the day, the month, the year, sidereal time and the orientation of the sky.

I also discovered a new astrolabe application to illustrate the precession of the equinoxes with my astrolabe commemorating mathematician and poet
Omar Khayyam (1048-1131).

The equation of time is the difference between true solar time and mean solar time, but in Switzerland and France it is the other way round, the difference between mean solar time and true solar time. And so the confusion begins....

In my paper, I present a new method of displaying the equation of time which removes all ambiguity arising from these confusing conventions since it relies on a rendering of the actual astronomical phenomenon.

My design philosophy is that aesthetics and functionality should serve each other with simplicity.

The book is about antisemitic practices at Moscow State University in the 1970's.
The so-called ``killer problems'' and my solutions were originally the IHES preprint
Mekh-Mat Entrance Examinations Problems, which you can download thus saving you the trouble of buying the book and reading the purely political sections. The subject matter inspired me to discover the

Fractal of David

Most of my papers are "scholarly", but even
if you're not too much into academics, you might be interested
in such stuff as
the
legacy of Archimedes.

I wrote a more extended English version called Archimedes, the Sand Reckoner which is a detailed analysis of his paper most accessible paper, The Sand Reckoner. To gain a better understanding, it proved helpful to typeset Archimedes'
original (up to minor changes through the centuries) Ancient Greek paper Ψαµµίτης which is even referenced in Βικιπαίδεια, the Greek Wikipedia.

If you know some mathematics then you might want to check out
if you understand what you know by
proving that pi exists. If you understand
why this is even an issue, then you are already doing OK. You can
then look at my proof that pi exists.

If you don't know anything about mathematics and would like to
know what I think about it, I have written written a play called
What is Mathematics? Actually it's in French:
C'est quoi les maths ?.

I was also interviewed on this subject, along with some of my colleagues, by the French TV channel Arte, on the (very coincidentally named) programme
Archimède.